MATLAB: Gradient feature extraction matlab code

feature extractiongradientgradient feature extractionImage Processing Toolboxsobel

Can anyone explain how to make Gradient feature vector? For example, if we take Sobel edge detection operator, then how to make feature vector?

Best Answer

There is edge() and imgradient() and imgradientxy(). So, once you have your edge image, what values from it do you want to stick into your feature vector? If you don't know, then we certainly don't know. You could stick virtually any number you want into a vector.

Related Solutions

MATLAB: What are the features we can extract using gabor filtering for images

If you are using a set of Gabor filters with different orientations and frequencies, then you have a host of features you can extract. A Gabor filter is essentially a sinusoidal signal with a given frequency and orientation, modulated by a Gaussian.

You can use it for edge and object detection, image representation and coding, color or pattern gradient, etc.

MATLAB: Error in storing HOG feature

extractHOGFeatures returns different sized features based on the image size. So you will need to resize images to the same image size if you expect the same feature length as follows:

I = imread(filename);
I = imresize(I,[256 256]); % align image size
featureVector = extractHOGFeatures(I);

Best Answer

Related Solutions

MATLAB: What are the features we can extract using gabor filtering for images

MATLAB: Error in storing HOG feature

Related Question